TOEFL Listening: TPO-TOEFL阅读TPO - 05_6254W5GYPM154N$

Why does the author mention Bushmen in South Africa in paragraph 2? A. To suggest that ancient artists from all over the world painted animals on rocks B. To contrast the location of their rock paintings to those found at Lascaux C. To support the claim that early artists worked in cramped spaces D. To give an example of other artists who painted in hidden locations